package main

import (
	"time"
	"fmt"
)

func test() {
	time.Sleep(time.Millisecond * 100)
}

func main() {
	now := time.Now()
	fmt.Println(now.Format("2006/01/02 15:04:00"))

	start := time.Now().UnixNano()
	test()
	end := time.Now().UnixNano()

	fmt.Println((end - start) / 1000)
}
